Goodwill represents the difference between the purchase price and the estimated fair value of identifiable assets acquired and liabilities assumed. Goodwill acquired in a business combination and determined to have an indefinite useful life is not amortized, but instead is tested for impairment at least annually in accordance with ASC 350. The following table represents the changes in the carrying value of goodwill for the years ended December 31, 2023 and 2022 (amounts in thousands):

During each of the fourth quarters of 2023, 2022 and 2021, the Company completed its annual impairment assessments and concluded that goodwill was not impaired in any of those years.

Intangible assets with a definitive life are amortized over their useful lives using the straight-line method, and the amortization expense is recorded within cost of product revenue and selling, general and administrative expense in the Company’s consolidated statements of comprehensive income. Intangible assets and their related useful lives are reviewed at least annually to determine if any adverse conditions existed that would indicate the carrying value of these assets may not be recoverable. More frequent impairment assessments are conducted if certain conditions exist, including a change in the competitive landscape, any internal decisions to pursue new or different technology strategies, a loss of a significant customer, or a significant change in the marketplace, including changes in the prices paid for the Company’s products or changes in the size of the market for the Company’s products. If impairment indicators are present, the Company determines whether the underlying intangible asset is recoverable through estimated future undiscounted cash flows. If the asset is not found to be recoverable, it is written down to the estimated fair value of the asset based on the sum of the future discounted cash flows expected to result from the use and disposition of the asset. If the estimate of an intangible asset’s remaining useful life is changed, the remaining carrying amount of

the intangible asset is amortized prospectively over the revised remaining useful life. The Company continues to believe that its definite-lived intangible assets are recoverable at December 31, 2023.

Indefinite-lived intangible assets are tested for impairment at least annually. There has been no impairment of our intangible assets for the periods presented.

Intangible assets, net consisted of the following at December 31, 2023:


	December 31, 2023
	Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Weighted Average Useful Life (in years)
	(Amounts in thousands)
Finite-lived intangible assets:
Technology - developed	$	249,594	$	(44,162	)	$	205,432		16
Patents		240		(240	)		—		8
Customer relationships		269,949		(83,963	)		185,986		15
Trademarks		8,757		(1,789	)		6,968		19
Other intangibles		3,914		(2,514	)		1,400		3
Total finite-lived intangible assets		532,454		(132,668	)		399,786		15
Indefinite-lived intangible asset:
Trademarks		700		—			700		—
Total intangible assets	$	533,154	$	(132,668	)	$	400,486

Intangible assets consisted of the following at December 31, 2022:


	December 31, 2022
	Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Weighted Average Useful Life (in years)
	(Amounts in thousands)
Finite-lived intangible assets:
Technology - developed	$	190,463	$	(30,992	)	$	159,471		16
Patents		240		(240	)		—		8
Customer relationships		252,934		(66,559	)		186,375		15
Trademarks		7,682		(1,319	)		6,363		19
Other intangibles		2,811		(2,044	)		767		4
Total finite-lived intangible assets		454,130		(101,154	)		352,976		16
Indefinite-lived intangible asset:
Trademarks		700		—			700		—
Total intangible assets	$	454,830	$	(101,154	)	$	353,676

Amortization expense for finite-lived intangible assets was $31.1 million, $27.1 million and $22.1 million for the years ended December 31, 2023, 2022 and 2021, respectively. As of December 31, 2023, the Company expects to record the following amortization expense (amounts in thousands):